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x=-2" alt="2x+4=0 =>x=-2" align="absmiddle" class="latex-formula">
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x=- \frac{1}{2} " alt="4x+2=0=>x=- \frac{1}{2} " align="absmiddle" class="latex-formula">
+ - +
-----------------|----------------O--------------->x
-1/2 -2
Ответ: x∈
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0 " alt=" \frac{3x+6}{9x-3} >0 " align="absmiddle" class="latex-formula">
+ - +
-----------------|---------------O------------------>x
-2 1/3
Ответ: х∈
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∨
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0 \\ \\ x-1>0 \\ x>1 " alt=" \frac{1}{x-1}>0 \\ \\ x-1>0 \\ x>1 " align="absmiddle" class="latex-formula">
Ответ: х∈